export const a = 9007199254740993;
export const b = 5123000000000000000000000000001;
export const c = 1230000000000000000000000.0;
export const d = .1230000000000000000000000;
export const e = 0X20000000000001;
export const f = 0X2_000000000_0001;

const x = 9007199254740993;
const x = 9_007_199_254_740_993;
const x = 9_007_199_254_740.993e3;
const x = 0b100_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_000_001;